Armature-assembly apparatus



Nov. 6, 1928.

R. W. BAKER ARMATURE ASSEMBLY APPARATUS Filed April 12, 1927 2 Sheets-Sheet Nov. 6, 1928.

R. W. BAKER ARMATUHE ASSEMBLY APPARATUS 2 Sheets-Sheet Filed April 12, 1927 n /h 6 W M W Patented Nov. 6, 1928.

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. ANDERSON, 1 4 4 4 5 1% s Paws-11m? c s-rate enema-As am? Applicatien filed April 12, 1927. Serial No. 188,079.

This invention relates to the manufacture of armatures for dynamo-electric machlnes and especially to apparatus for assembling a commutator upon an armature shaft 111 a l certain relation tothearmature windlngs.

'It is an object of this inventionto reduce the cost of performing'the operation of asseinbling a commutator upon an armature shaft in a'icertain relation to the armature windings and of markin a certain bar of the commutator to which arare related the subsequent operations of connecting the ar-' mature conductors with the commutator. Further objects and advantages of the present invention will apparent from the following description, reference being had to the accompanying drawings wherein a preferredembodiment of. onei orm of the pres ent invention is clearly shown. Inthe drawings: Fig. 1 is a front elevation of a mach ne embodying the present invention.

Fig. 2 is a side viewpartlyin section. Fig. 3 is a view similar to Fig. 2, show ng the apparatus-in its position after havlng forced a commutator" upon an armature hafgcertain parts being shown in longitudinal section. t

Fig. 4 is a sectional view on line 4-4 of Fig. v5 is a sectional view on line 5-5 of Fig. 2.

r Fig. 6 is a sectional view on line 66 of Fi a frame of the arbor press type and having a pedestal 21 which supports a movable rod 22 moved in both directionsverti cally by any suitable mechanism not! shown, such as an air cylinder and piston. The rod 22 is provided with a'groove 23 for receiving a key 24 which prevents rotation of the rod 22. The rod 22 is provided with a central bore 25 for receiving a spring 26 which urges down 'wardly' a plunger 62? having 'a central bore for receiv-lng the of marmamre shaft 60 when theplnnger moves into the position shown in Fig.3. kbtatioili of the plunger 27 relative to the i'od' fiiis by ascrew table 41 fieferring to the drawings, 20 designates We t i g ieve a in mutator core 33 in alignment with the rod 22. The lower end of the rod 22 is'provided with an annular boss adapted to engage the upper end of thecommutator in order to strip the icommiitator from the plunger 27,-

as will be described.

The base 20 carrying a tiltable table 41 comprising a hub portion 42 which swings in an opening in pivotally supports a shaft the base 20 between'the bearings 43 and 44 for the shaft 40, and flanges 45 and 46 "which carry buttons 47 adaptedito rest upon plates 48 and. 49 attached to the base. The base 20 supports aflsoeket'member 50 which" is in alignment with the plunger 27 when the is inthe positionshown in Fig. 2. Thesoj'cket member 50 has a central bore 51 for receivingan armatureshaft attached to ceived by a certain slot of the core 61. For

amp e, l ca in from t 62 of the last coil to be wound core, coil 62 as shown'in Fig. 5.

I shall now describe thedevices for locatthe core slot which must receive the upon the an ,armaturecore filcarrying windings 62. 7

upon a suitable seat .52 V

blade 55 may bethe fourth .one'awav at slot from which emerge the ends ing the commutator 32 properly relative to core 61 and for marking a certain one of its segments ,for identification as the startmg po nt for the subsequent operations of connecting the armature conductor leads with th QOmmUtEItOr, each seg.

e segments o mer t having been slotted as shown at 34 in Fig. 2. The re 22*. e ncar'its lower end a cpllar 1Z0 :which carries a pin 71 for pivot ally supporting an arm blade 73 adap ed to enter the slot 34: =otany ne of the omm t t r s gments :34 to locate the commutator frqm Wining- Springs -74, attached to pins 72 carrying a thin properly and ,to prevent it tio 75 of the collar 70, and pins 76 of the arm 72, urge the arm 72 toward the connnutator 32 and thus maintain the blade 73 within a segment slot St. The arm 72 carries a pointed pin T7 of hard metal bearing against that segment of the commutator which is verti cally above a radial line passing through the axis of the shaft (30 and the central part of the upper end of the core slot into which the blade extends.

Before placing an assembly of armature shalt (it), core 61, and windings (32 upon the tal le l1, the table is tilted clockwise, as viewed in Fig. :2 from the position shown therein until a spring pressed plunger 90 guided by the base it) enters a recess 91 in the hub 12 ot' the table. 111 this position of the table the socket member 50 is out of alignment with the rod :22 sulliciently to permit, mounting an armature assembl upon it with one end of the shaft (30 with the socket recess 51. The armature assembly is so mounted that the locating blade enters the proper core slotas shown in Fig. Then the table with the assembly supported thereby may be located as shown in Fig. 2, in which the shaft (it) is in vertical alignment with the rod A commutator 32 is mounted upon the plunger chuck 30 with the locating blade 73 in one of its slots 3%. The rod 212 is caused to move (.lownwardly by any suitable power means in order to bring the end of the chuck 30 against a shoulder joining the commutator receiving portion tit) of the shaft (it) with a portion till 01" smaller diameter and :usapted to enter the cent :11 recess of the plunger Atter the end of the chuck 3O striker-1 this shoulder (30", the rod will continue to move downwardl to cause the boss 35 to engage the commutator 32 and to strip it from the chuck 30 and to force it over the commutator receiving portion (30 of the shaft (it).

By the time that the commutator 34; has been assembled upon the shalt 60, the pointed pin 77 will have been forced into a segment 34; due to the engagement of a surface 78 of the arm T2 with a surface 79 ot a bracket 80 which is adjustably secured to the. pedestal 21. The bracket St) is verti ally sl'idable between guides 81. and is secured by a washer 82 and screw 32) which passes through a slot 84 in the bracket 80 and is threaded into a tapped hole in the pedestal it. Thus. a certain segment lwhich has been located in a predetermined manner relative to a certain snot of thearmature core will be marked with a prick punch marl. which will identify that segment as beiug the one to which are related all of the suh-, sequent operations of connecting the armatu e conductor leads to the commutator segments.

Following this commutato assembling and eonmuuator marking operation the rod 2; is cau ed to return to the upper position to pcrmit removal of the work from the socket member which is preceded by tilting the work and. table out of alignment with the rod This apparatus also shapes the comluctors (32 which extend across the bottom (it the core (31., referring to the lo -ation oi. the core in the socket member so. The membe fit) provides a shoulder ltlt) for receiving a collar 101 attached. to the shaft tit). This collar lUl may be an oil throwings )iral gca r. The windings 2 will strike the seat 52 iz-cl'orc the collar lUl, strikes the shoulder tUti. i'hilc the comlnutator ii is being forced over the shalt portion tlti". the windings t3: at the end of the core. remote lrom the commutator are being colopi l or shaped by the seat 513, and this shaping continues until the collar 101 engages the seat lt t). 'lluneforc the coi'uluctors (33 will he compr sed into a mass at this end of the core 01. which mass will be spaced a certain distance from the collar 101. .l-lencc a delinito clearance will be provided between the windings (32 and the end frame ol the dynamo.

After removing the screw lit), the socket membe 5t) ma be removed and he placed by one adapted to receive a core and shaft as semblr having other dimensions.

.Vhile tl e form of embodiment oi the present invention as herein disclosed, constitutes a preferred form, it is to be understoml that. other forms might: be adapted, all (YOIDlIlQ within the scope of the clainis which follow. i

llhat is claimed is as follows:

1. Apparatus fo' assembling an ari'nature comprising a support for an as:-:eml )l v ol armature shaft and an armature core carrywindings; a support: for a 'ommutator in alignment with the armature shalt; means for producing movement of one support relatively to the other in order to force the conunututor over the armature shaft; and 111*:1118 rcsponsive to said relative movement for marking one of the mnnmntator bars.

2. Ap aratus tor assembl ving an armature. comprising a support to an assembly of armature shalt and an armature core carrying windings: a support, tor a connnutator in alignment with the armat ure shatt means for producing movenumt ol on a support relatively to the other in order to force the counnuta tor over the armature shaft: and means rcsponsive to said relative. movement for compact ingthe conductors adjacent one end of the armature core into a mass having a certain relation to the armature shall.

3. Appa atus for assembling a con'unutator having a tubular hub upon a shaft having a commutator receiving portion. comprising in combination, means for supporting the shaft: means independent of the shaft 't'or temporarily supporting the commutator in alignment with the shaft and for locating it around the shaft and adjacent the commututor receiving portion thereof; means for removing the commutator from the tempo rary supporting means and for forcing it loo llio

alongthe commutator receiving portion of" portion of smallerdiameteri than the-commutato'n receiving portion located: between" an end of the shaftandr the commutator r eceiiving portion; comprising: in combin'ationy a tube for receiving the commutator and; "adapted .tor-reeeivethe shaft portion of smaigla'r diameter; means forsupporting the armature shaft inalaignment with the-tube and in r :1 certalirr angular relation therewith means-for producing relative movement between the tube and shaft so thatthe commue tatorfwwillibei leaned around the shaft and adjacent the commutator receiving portion thereof; means for transferring the commutator from the tube to the commutatorreceiving portion of the shaft; and means ac- A tuated during said relative movement for fit) marking a bar of the commutator placed upon said shaft.

5. Apparatus for assembhng acommutator having a tubular hub upon a shaft havlng a commutator receiving portion and a portlon of smaller diameter than the commutator receiving portion located between an end of the shaft and the'jcommutatorreceiving portion, comprising in combination, means xfor supporting the shaft and for maintaining the shaft in a certain angular position; means 1ndependent of the shaft for temporarily supporting the commutator 1n ahgnment w th the shaft and in a certain angular relatlon to said shaft and for locating it around the shaft portion of smaller diameter; a tubular stripping member movable 1n alignment with the shaft and adapted to engage one end of the commutator and to remove it from the temporary holding means and to force the commutator along the commutator receiving portion of the shaft; and means actuated during the stripping of the commutator from the temporary holding means for marking a bar of the commutator placed upon said shaft. r I

6. Apparatus for assembling a con'imutator having a tubular hub upon a shaft having a commutator receiving portion and a portion of smaller diameter than the commutator receiving portion located between an end of the shaft and the commutator recelvlng portion, comprising in combination, a tube for temporarily holding the commutator and adapted to receive the shaft portion of smaller diameter; a stripper supporting and guiding the tube and adapted to engage an end.

of the commutator; means limiting relative movement between the tube and the stripper; means for supporting the shaft in alignment with the tube and in a certain angular relation to said tube; means for producing relaa commutator: receiving portion.

tive movement betweem the shaft and the-tube and stripperiwhereby' theicommutator will be commutator; receivingiportion thereof; and i then ther=stripperv wilhcause: the1commutator:,

.to'; be, transferred fronrthe tube to the com mutation receiving portionof the shaft and means actuatect during swidi relatia emove ment} for: marking. anbar of the commutator placedupon s'wid shaft. i

it, Apparatus for assembli tor having a tubular hub-upon shaft having ng. a conunuta and a por tlQDFOZESIIIRllBI diameter th'anthe commutator receiving portion located-between an endof; the shaft and the-coimnutator receiving portion, comprising in; combination; a tube for temporarily hoddingr the commutatorand adapted to receive the shaft portion of smaller diameter; and guiding said commutator supporting tube and adapted to engage an end of the commutator; a spring within the stripper for urging the tube outwardly from the stripper;

means for limiting the outward movement of said tube relative to the stripper; means for supporting the shaft in alignment with the tube and in a certain angular relation to said tube; means for producing relative movement between the shaft and the tube and stripper whereby the commutator will be located around the shaft and adjacent the commutator receiving portion thereof, and then the stripper will cause the commutator to be transferred from the tube to the commutator receiving portion of the shaft; a member movably supported by the stripper and carrying an instrument commutator bars; and means for engaging said member during said relative movement for causing the instrument to mark a bar of the commutator placed upon said shaft.

8. Apparatus according to claim 7 in which the movable member carried by the stripper is provided with a part for entering a recess in the commutator in order to locate the commutator in a certain angular position.

9/ Apparatus for assembling a commutator having a tubular hub upon a shaft having a commutator receiving portion,comprising in combination, means for supporting the shaft; means for temporarily supporting the commutator in alignment with the shaft; means for forcing the commutator upon the coma tubular stripper supporting I for marking one of the loo between the sha'r'tand the commutator temporary supporting means in order to force the COIIllIlLlllilllOl' over the commutator receiving portion of the shaft; a member carried by the commutator temporary supporting means and having an instrument for marking a bar of the coimnutator; and means engageable with said member for causing the instrument to mark the bar duringsaid relative movement between the shaft and the means which ten'iporarily supports the commutator.

11. Apparatus for assembling a commutator having a tubular hub upon a shaft having a commutator receiving portion, comprising in combination, means for supporting the shaft; a rod axially movable relative to the shaft and coaxial therewith; means carried by the rod for temporarily supporting the conunutator in alignnient with the shaft; means for fixing the commutator in a certain angular posltion relative to the shaft; a lever pivotally supported by the rod and carrying an instrument engageable with the commutator for marking one of its bars; and a cam located in the path of movement of the lever when the rod is axially moved relative to the shaft in order to engage the lever and cause the instrument to mark a bar of the commutator.

12. Apparatus according to claim 11 in which the pivoted lever carries a part adapted to move into a recess provided by the commutator in order to prevent rotation thereof.

In testimony whereof I hereto aflix my signature.

R. W. BAKER. 

